Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended
	Mar. 22, 2022	Mar. 22, 2022	Sep. 13, 2021	Dec. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jan. 14, 2019	Apr. 20, 2018
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)				5,000,000	5,000,000
Preferred stock, par value (in usd per share)				$ 0.001	$ 0.001
Series 4 Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)				10,415	10,415						10,415
Preferred stock, par value (in usd per share)											$ 1,000
Series preferred stock conversion value (in usd per share)											$ 16,740
Preferred stock, shares outstanding (in shares)				1	1
Series 5 Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)				12,000	12,000					12,000
Preferred stock, par value (in usd per share)										$ 1,000
Series preferred stock conversion value (in usd per share)										$ 11,238.75
Preferred stock, shares outstanding (in shares)				126	126
Series 7 Convertible Preferred Stock
Class of Stock [Line Items]
Mezzanine equity, convertible preferred stock, shares authorized (in shares)			58,750
Net proceeds from issuance of preferred stock			$ 50.6
Preferred redeemed for cash (in shares)		49,250
Preferred shares redeemed, cash consideration		$ 49.3
Mezzanine equity, convertible preferred stock, shares outstanding (in shares)					0	53,198	0	0	49,250
Series 7 Convertible Preferred Stock | Registered Direct Offering
Class of Stock [Line Items]
Subscription price (in usd per share)			$ 920
Original issuance discount percentage			8.00%
Aggregate subscription value			$ 54.1
Series 7 Convertible Preferred Stock | Registered Direct Offering | Warrants
Class of Stock [Line Items]
Number of shares sold under offering (in shares)			626,667
Series 8 Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	53,197.7234	53,197.7234
Preferred stock, shares outstanding (in shares)					0
Net proceeds from issuance of preferred stock	$ 46.9
Preferred redeemed for cash (in shares)				53,197.72
Preferred shares redeemed, cash consideration				$ 53.2
Mezzanine equity, convertible preferred stock, shares outstanding (in shares)							53,198	53,198	0
Series 8 Convertible Preferred Stock | Registered Direct Offering
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	53,197.7234	53,197.7234
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Number of shares sold under offering (in shares)	1,503,726
Subscription price (in usd per share)	$ 940	$ 940
Original issuance discount percentage	6.00%	6.00%
Aggregate subscription value	$ 50.0	$ 50.0